Across
- 3. The element formed when hydrogen fuses in low-mass stars.
- 4. A failed star with too little mass to sustain hydrogen fusion.
- 5. Puzzle: The Life and Death of Stars
- 6. A developing star that has not yet begun fusion.
- 11. A stage in high-mass stars before iron formation.
- 14. An element formed from helium fusion in some stars.
- 18. A rotating disk of material falling into a black hole or white dwarf.
- 19. The force that supports a neutron star against collapse.
- 22. The heaviest element formed in the core of a high-mass star before collapse.
- 24. A method used to distinguish brown dwarfs from low-mass stars.
- 25. The glowing shell of gas ejected from a dying red giant.
Down
- 1. The longest stage in a star’s life, where it fuses hydrogen into helium.
- 2. A unit used to measure the mass of stars, relative to the Sun.
- 4. The final fate of the most massive stars after supernova collapse.
- 7. The expanded, cooler phase of a low-mass star after hydrogen is exhausted.
- 8. A dense stellar remnant left behind after some supernovae.
- 9. The event that triggers a supernova in massive stars.
- 10. The smallest and longest-living type of main-sequence star.
- 12. The spectral class of the coolest known stars, including brown dwarfs.
- 13. The maximum mass a white dwarf can have before collapsing.
- 15. The leftover core of a low-mass star after shedding its outer layers.
- 16. Nearly massless particles released in huge numbers during a supernova.
- 17. The primary fuel source for stars during most of their lifetimes.
- 20. The explosive death of a high-mass star.
- 21. A form of hydrogen that some brown dwarfs can fuse.
- 23. The process that powers stars, converting hydrogen into helium.